Taylor Swift Lets Loose in 'Speak Now'

Taylor Swift may be young, but she's made a clear message in her music that she doesn't like to be messed with.

At least that's what she echoes in her latest album, "Speak Now," which is due out Oct. 25. Swift answers stars and critics who have wronged her. The once-demure girl-next-door is letting loose.

"This [album] is number three, so I figure that these people have had fair warning," the singer said in an interview with People magazine.

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Taylor Swift Jabs John Mayer in Song?

It has been suggested that the song "Dear John" is really about John Mayer. The magazine reports that the singer avoided directly answering whether or not the ballad was meant for Mayer. But the man in the song strongly resembles Mayer, its lyrics describing an older guy who "messed with" her.

She sings:

Dear John,
I see it all now that you're gone
Don't you think I was too young
To be messed with
The girl in the dress
Cried the whole way home

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I should have known.

Swift admits that she has written songs specifically about people from her past.

"A lot of times when people's relationships end, they write an e-mail to that person and say everything that they wish they would have said. A lot of times they don't push send," Swift told People.

But Mayer is not the only star the 20-year-old Swift has had a message for. It has been suggested that another track, titled "Better than Revenge," was written about her breakup with Joe Jonas of the Jonas Brothers band. And Reuters reports that the song "Mean," which was recently released, is a stab at those who criticized Swift's voice at the 2010 Grammy awards and other live shows. Just last month Swift performed "Innocent" in front of Kanye West, dressed in white and barefoot at the VMAs singing, "Who you are is not what you did."

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John Mayer's Apology Caught on Tape

Taylor Swift Lets Loose in 'Speak Now'

Despite Swift's breakups with Joe Jonas and Taylor Lautner, the singer said that she is happy being single and her new album is an outlet to express her feelings about her past and criticisms.

"There's been extreme joy, extreme pain, extreme curveballs," Swift told People in the latest issue. "Sometimes when things impact you so intensely, it takes writing a song to get over them."